CN110940827A - Magnetoelectric revolution speed transducer suitable for large-interval measurement - Google Patents
Magnetoelectric revolution speed transducer suitable for large-interval measurement Download PDFInfo
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- CN110940827A CN110940827A CN201911043741.7A CN201911043741A CN110940827A CN 110940827 A CN110940827 A CN 110940827A CN 201911043741 A CN201911043741 A CN 201911043741A CN 110940827 A CN110940827 A CN 110940827A
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- speed sensor
- magnetoelectric
- wire coil
- enameled wire
- shaft end
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P1/00—Details of instruments
- G01P1/02—Housings
- G01P1/026—Housings for speed measuring devices, e.g. pulse generator
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- General Physics & Mathematics (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
A magnetoelectric tachometer adapted for large-pitch measurements, comprising: the electromagnetic rotating speed sensor comprises an armature framework, an enameled wire coil, a shell, an insulating sleeve, an insulating gasket, a lead, a connector and a shaft end bolt embedded with a permanent magnet, wherein the armature framework, the enameled wire coil, the insulating sleeve and the insulating gasket are assembled into a combined piece; the shaft end bolt is installed on the rotating shaft to be measured, periodic magnetic field change is formed through the permanent magnet, and the assembly is installed in the magnetic field change range, so that the enameled wire coil generates a sinusoidal alternating current signal, and alternating current is periodically converted into the number of revolutions. The invention has the advantages of large distance non-contact measurement between the sensor and the rotating shaft, large output amplitude and strong vibration resistance.
Description
Technical Field
The invention relates to a magnetoelectric rotating speed sensor suitable for large-interval measurement, and belongs to the technical field of testing.
Background
The aerospace engine is a high-temperature and high-speed rotating mechanical device, the working state of the aerospace engine is different from that of a common rotating machine, the aerospace engine is in a severe environment of high temperature and vibration, the requirement on a measuring device for measuring the running state of the rotating speed is strict, and the aerospace engine has the characteristics of high reliability, strong vibration resistance and the like. With the development of aerospace technology in China, rocket launching tasks are increased year by year, an engine is used as a source of rocket power, monitoring of the working state of the engine is of great importance in test run and flight, evaluation of the performance of the engine is directly influenced, the rotating speed of the rocket engine is an important parameter reflecting the running condition of the engine, and the rotating speed of a turbopump is considered as a first-choice parameter for fault diagnosis and emergency shutdown regardless of a conventional engine or a liquid oxygen kerosene engine. In a carrier rocket flight test, the engine speed measurement data are abnormal occasionally, and the reasons are as follows: 1) the sensor short line or a connecting cable between the sensor short line and the speed measuring electronic device is opened; 2) the amplitude of the output signal of the sensor is not matched with the input threshold voltage of the speed measuring electronic device; 3) external electromagnetic interference causes signal fluctuations. The output signal amplitude of the existing sensor is small, the matching performance with a subsequent speed measuring electronic device is influenced, and the accuracy of the measured data can be greatly influenced; and the existing rotation speed sensor is generally installed in the distance of 2-5mm of the measured object, and the rotation speed sensor body is easy to damage under the severe mechanical and temperature environments, so that a rotation speed measuring device which has large output signal amplitude and strong vibration resistance and can meet the requirement of large-distance measurement needs to be developed, the large-distance measurement can ensure that the sensitive part of the rotation speed measurement is far away from the severe environment source as far as possible, and the reliability of the sensor is improved.
Disclosure of Invention
Aiming at the defects and requirements of the prior art, the invention aims to provide a magnetoelectric rotating speed sensor suitable for large-distance measurement, and aims to solve the problems that the conventional rotating speed sensor is small in output amplitude and is easy to be abnormal under the conditions of high vibration frequency and high environment temperature detection.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a magnetoelectric tachometer adapted for large-pitch measurements, comprising: the electromagnetic rotating speed sensor comprises an armature framework, an enameled wire coil, a shell, an insulating sleeve, an insulating gasket, a lead, a connector and a shaft end bolt embedded with a permanent magnet, wherein the armature framework, the enameled wire coil, the insulating sleeve and the insulating gasket are assembled into a combined piece; the shaft end bolt is installed on the rotating shaft to be measured, periodic magnetic field change is formed through the permanent magnet, and the assembly is installed in the magnetic field change range, so that the enameled wire coil generates a sinusoidal alternating current signal, and alternating current is periodically converted into the number of revolutions.
Preferably, the armature framework is isolated from the enameled wire coil by the insulating sleeve and the insulating gasket in the assembly, and the enameled wire coil is wound on the armature framework.
Preferably, the central axial direction of the sensitive assembly of the magnetoelectric revolution speed transducer is vertical to the axis of the rotating shaft to be measured; the central axis is the winding center of the enameled wire coil and is optimally kept flush with the center of the permanent magnet.
Preferably, the armature framework is in an I-shaped structure and comprises a T-shaped frame and a disc which are assembled, the transverse end of the T-shaped frame is in a disc structure, and two grooves for leading wires to pass through are formed in the structure; the vertical end is used for winding the enameled wire coil, and the end part of the vertical end is provided with the disc.
Preferably, the shell is provided with an external thread for mounting the sensitive assembly of the magnetoelectric speed sensor.
Preferably, the electromagnetic speed sensor sensitive assembly further comprises a nut, and the mounting and fixing of the electromagnetic speed sensor sensitive assembly are realized through the nut and an external thread on the shell.
Preferably, the permanent magnet realizes embedded installation through interference fit with the mounting hole preset on the shaft end bolt, and is flush with the excircle of the shaft end bolt.
Preferably, the permanent magnet realizes embedded installation through interference fit and gluing with the mounting hole of predetermineeing on the axle head bolt to with the excircle parallel and level of axle head bolt.
Preferably, the optimal installation distance between the bottom of the permanent magnet and the central axis of the shaft end bolt is not more than 10 mm.
Preferably, the distance L between the end part of the shell and the outer circle of the shaft end bolt can reach 50 mm.
Compared with the prior art, the invention has the following advantages:
1) according to the magnetoelectric rotating speed sensor suitable for large-interval measurement, the periodical change of the magnetic field of the permanent magnet on the shaft end bolt is sensed by the sensing assembly, a split structure is adopted, and compared with the form that the permanent magnet is arranged in the sensor, the amplitude of the output signal of the magnetoelectric rotating speed sensor is greatly increased, so that the subsequent signal processing is facilitated, and the external electromagnetic interference can be effectively solved.
2) Compared with the traditional magnetoelectric sensor which adopts a mode that a nonmetal coil framework is adopted to wind a coil and then is combined with an armature, the magnetoelectric speed sensor is more beneficial to the change of a sensitive magnetic field of a sensor assembly, and the sensitivity of the sensor is higher. In addition, the sensor is simpler and more compact from the structural point of view, and the shape and the volume of the sensor can be effectively reduced.
3) When the permanent magnet of the magnetoelectric speed sensor suitable for large-interval measurement is embedded into the shaft end bolt, the optimal installation distance between the bottom (close to the inner bottom surface) of the permanent magnet and the central axis of the shaft end bolt is not more than 10mm, and the top (close to the outer plane) of the permanent magnet is flush with the excircle of the shaft end bolt. The design can not only inhibit multimodal clutter from appearing in the output waveform of the speed sensor in a limited way, but also ensure that the effective rotating radius of the permanent magnet reaches the maximum, so that the useful signal output by the sensor reaches the maximum. The design effectively improves the output signal quality of the sensor.
4) According to the magnetoelectric rotating speed sensor suitable for large-distance measurement, the distance between the sensitive assembly of the magnetoelectric rotating speed sensor and the shaft end bolt can be increased to 50mm or more, and the amplitude of the magnetoelectric rotating speed sensor can meet the processing requirement of a subsequent speed measurement electronic device. The sensor is more suitable for measuring the measured rotating shaft in high-temperature and severe mechanical environment.
5) The magnetoelectric revolution speed transducer suitable for large-interval measurement provided by the invention has the advantages that the integral encapsulation treatment is carried out on the interior of the transducer, the sensitive element is isolated from the external environment, the sensitive element can withstand the severe working environments such as damp heat, oil stain and the like, and the sensitive element can withstand high-frequency vibration without being damaged.
Drawings
FIG. 1 is a cross-sectional view of a magnetoelectric tachometer sensor suitable for large-pitch measurement in accordance with the present invention;
FIG. 2 is a schematic view of an armature skeleton according to the present invention;
fig. 3 is a measurement frame diagram of a magnetoelectric tachometric transducer suitable for large-pitch measurement according to the present invention.
The magnetic field sensor comprises a magnetic field sensor.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples:
in this embodiment, as shown in fig. 1 to fig. 3, a magnetoelectric tachometric transducer suitable for large-pitch measurement includes: the device comprises an armature framework 1, an enameled wire coil 2, a shell 3, an insulating sleeve 4, an insulating gasket 5, a lead 6, a connector 7, a screw 8 and a shaft end bolt 10 embedded with a permanent magnet 10-1, wherein the shaft end bolt 10 is installed on the end face of a measured rotating shaft. Armature skeleton 1, enameled wire coil 2, insulation support 4, insulating pad 51 assemble into a subassembly, lead wire 6 is used for connecting enameled wire coil 2 and connector 7, the subassembly that armature skeleton 1, enameled wire coil 2, insulation support 4, insulating pad 5 assembled install inside casing 3, adopt silicon rubber to fill in gap department embedment, contact 7 is fixed in casing 3 through screw 8 after being connected with lead wire 6 and forms a magnetoelectric tachometric transducer's sensitive assembly.
The armature framework 1, the enameled wire coil 2, the insulating sleeve 4, the insulating gasket 5 and the lead 6 are assembled to form a combined piece, the combined piece is installed inside the shell 3, the gap is filled with silicon rubber for encapsulation, the sensitive element combination of the magnetoelectric speed sensor is isolated from the outside, the damp external detection environment can be isolated, and the damping effect can be achieved.
The armature framework 1 is made of 1J79 material and is of an I-shaped structure, the armature framework 1 is formed by assembling a T-shaped frame 1-1 and a disc 1-2, and two semicircular grooves 1-3 are designed at the disc end of the T-shaped frame 1-1 and are used as enameled wire routing grooves of an enameled wire coil 2.
The enameled wire coil 2 described in this embodiment is wound on the armature framework 1, and the insulating sleeve 4 and the insulating gasket 5 are padded between the enameled wire coil 2 and the armature framework 1 and are fixed by glue to serve as spacers.
The lead wire 6 described in this embodiment is connected to the enamel wire of the enamel wire coil 2.
The housing 3 described in this embodiment is designed with threads for mounting and fixing the magnetoelectric speed sensor.
This embodiment magnetoelectric tachometric transducer still include the external screw thread fit of nut 9 and casing 3 for magnetoelectric tachometric transducer installs fixedly.
As shown in fig. 3, in the measurement framework of the embodiment, the shaft end bolt 10 is installed on the rotating shaft, the magnetoelectric rotation speed sensor is fixedly installed at a distance of the shaft end bolt 10L through a thread and a nut 9, an optimal installation distance between the bottom of the permanent magnet 10-1 and a central axis of the shaft end bolt is not greater than 10mm, the permanent magnet 10-1 forms periodic magnetic field changes at the periphery of the magnetoelectric rotation speed sensor along with the rotation of the shaft end bolt 10, and under the action of the armature framework, magnetic flux at the position of the enameled wire coil 2 is influenced and periodically changes, so that the enameled wire coil 2 generates a sinusoidal alternating current signal, and alternating current is periodically converted into a number.
In an actual test experiment, the gap installation gap between the rotating speed sensor and the measured object in the embodiment is 50mm, the effective value of the output sine wave can reach more than 200mv, and the processing requirement of the subsequent speed measurement electronic rotating speed is met.
The invention has not been described in detail in part in the common general knowledge of a person skilled in the art.
Claims (10)
1. The utility model provides a magnetoelectric tachometric transducer suitable for big interval is measured which characterized in that includes: the electromagnetic rotating speed sensor comprises an armature framework, an enameled wire coil, a shell, an insulating sleeve, an insulating gasket, a lead, a connector and a shaft end bolt embedded with a permanent magnet, wherein the armature framework, the enameled wire coil, the insulating sleeve and the insulating gasket are assembled into a combined piece; the shaft end bolt is installed on the rotating shaft to be measured, periodic magnetic field change is formed through the permanent magnet, and the assembly is installed in the magnetic field change range, so that the enameled wire coil generates a sinusoidal alternating current signal, and alternating current is periodically converted into the number of revolutions.
2. The magnetoelectric rotation speed sensor according to claim 1, wherein: the armature framework is isolated from the enameled wire coil by the insulating sleeve and the insulating gasket, and the enameled wire coil is wound on the armature framework.
3. The magnetoelectric rotation speed sensor according to claim 2, wherein: the central axial direction of the sensitive assembly of the magnetoelectric revolution speed transducer is vertical to the axis of the rotating shaft to be measured; the central axis is the winding center of the enameled wire coil and is optimally kept flush with the center of the permanent magnet.
4. A magnetoelectric rotation speed sensor according to claim 1 or 2, characterized in that: the armature framework is of an I-shaped structure and comprises a T-shaped frame and a disc, wherein the disc is assembled, the transverse end of the T-shaped frame is of a disc structure, and two grooves for leading wires to pass through are formed in the disc structure; the vertical end is used for winding the enameled wire coil, and the end part of the vertical end is provided with the disc.
5. The magnetoelectric rotation speed sensor according to claim 1, wherein: the shell is provided with external threads for installing the sensitive assembly of the magnetoelectric revolution speed sensor.
6. The magnetoelectric rotation speed sensor according to claim 1, wherein: the electromagnetic speed sensor is characterized by further comprising a nut, and the mounting and fixing of the sensitive assembly of the electromagnetic speed sensor are achieved through the nut and the external threads on the shell.
7. The magnetoelectric rotation speed sensor according to claim 1, wherein: the permanent magnet realizes embedded installation through interference fit with the mounting hole preset on the shaft end bolt, and is flush with the excircle of the shaft end bolt.
8. The magnetoelectric rotation speed sensor according to claim 7, wherein: the permanent magnet realizes embedded installation through interference fit and gluing with the preset mounting hole on the shaft end bolt, and is flush with the excircle of the shaft end bolt.
9. The magnetoelectric rotation speed sensor according to claim 1, wherein: the optimal installation distance between the bottom of the permanent magnet and the central axis of the shaft end bolt is not more than 10 mm.
10. The magnetoelectric rotation speed sensor according to claim 1, wherein: the distance L between the end part of the shell and the excircle of the shaft end bolt can reach 50 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911043741.7A CN110940827B (en) | 2019-10-30 | 2019-10-30 | Magnetoelectric revolution speed transducer suitable for large-interval measurement |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911043741.7A CN110940827B (en) | 2019-10-30 | 2019-10-30 | Magnetoelectric revolution speed transducer suitable for large-interval measurement |
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| CN110940827A true CN110940827A (en) | 2020-03-31 |
| CN110940827B CN110940827B (en) | 2022-02-01 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111780971A (en) * | 2020-06-10 | 2020-10-16 | 杭州杰牌传动科技有限公司 | Multi-shaft transmission device fault diagnosis system and method based on rotation speed sensor |
| CN114487464A (en) * | 2021-12-24 | 2022-05-13 | 中国北方发动机研究所(天津) | Self-diagnosis self-cleaning magnetoelectric sensor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111780971A (en) * | 2020-06-10 | 2020-10-16 | 杭州杰牌传动科技有限公司 | Multi-shaft transmission device fault diagnosis system and method based on rotation speed sensor |
| CN111780971B (en) * | 2020-06-10 | 2022-05-27 | 杭州杰牌传动科技有限公司 | Multi-shaft transmission device fault diagnosis system and method based on rotation speed sensor |
| CN114487464A (en) * | 2021-12-24 | 2022-05-13 | 中国北方发动机研究所(天津) | Self-diagnosis self-cleaning magnetoelectric sensor |
| CN114487464B (en) * | 2021-12-24 | 2024-02-09 | 中国北方发动机研究所(天津) | Self-diagnosis self-cleaning magneto-electric sensor |
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